Which era has been the longest in earths history?

How did the relationship impact the desire of christian nations in the iberian peninsula to spread christianity?

Which best describes the characteristics of lynchings in the south from 1880 to 1910? a. the number of lynchings in the south increased b. the number of lynchings in the south decreased. c. the number of lynchings in the south stayed the same. od. the number of lynchings in the south equaled the number in the north

Why was russia drawn into a conflict with germany after ausria-hungary declared war on serbia ?